28778812304 has 240 divisors, whose sum is σ = 68148638208. Its totient is φ = 11708928000.

The previous prime is 28778812301. The next prime is 28778812333. The reversal of 28778812304 is 40321887782.

It is not an unprimeable number, because it can be changed into a prime (28778812301) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68358014 + ... + 68358434.

Almost surely, 2^28778812304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28778812304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34074319104).

28778812304 is an abundant number, since it is smaller than the sum of its proper divisors (39369825904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28778812304 is a wasteful number, since it uses less digits than its factorization.

28778812304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 50.

The spelling of 28778812304 in words is "twenty-eight billion, seven hundred seventy-eight million, eight hundred twelve thousand, three hundred four".